LTC3776EUF 查看數據表（PDF） - Linear Technology
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LTC3776EUF
Linear Technology
LTC3776EUF Datasheet PDF : 28 Pages
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LTC3776
ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage (VIN) ........................ – 0.3V to 10V
PLLLPF, RUN/SS, SYNC/SSEN,
VREF, SENSE1+, SENSE2+, VFB2
IPRG1, IPRG2 Voltages ................. – 0.3V to (VIN + 0.3V)
VFB1, ITH1, ITH2 Voltages ........................... – 0.3V to 2.4V
SW1, SW2 Voltages .............. –2V to VIN + 1V (10V Max)
PGOOD ..................................................... – 0.3V to 10V
TG1, TG2, BG1, BG2 Peak Output Current (<10µs) ..... 1A
Operating Temperature Range (Note 2) ... –40°C to 85°C
Storage Temperature Range .................. –65°C to 125°C
Junction Temperature (Note 3) ............................ 125°C
Lead Temperature (Soldering, 10 sec)
(LTC3776EGN) ..................................................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
24 23 22 21 20 19
ITH1 1
IPRG2 2
PLLLPF 3
SGND 4
VIN 5
VREF 6
18 SYNC/SSEN
17 TG1
16 PGND
25
15 TG2
14 RUN/SS
13 BG2
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 37°C/W
EXPOSED PAD (PIN 25) IS PGND
MUST BE SOLDERED TO PCB
ORDER PART
NUMBER
LTC3776EUF
UF PART MARKING
3776
SW1 1
IPRG1 2
VFB1 3
ITH1 4
IPRG2 5
PLLLPF 6
SGND 7
VIN 8
VREF 9
VFB2 10
ITH2 11
PGOOD 12
TOP VIEW
24 SENSE1+
23 PGND
22 BG1
21 SYNC/SSEN
20 TG1
19 PGND
18 TG2
17 RUN/SS
16 BG2
15 PGND
14 SENSE2+
13 SW2
GN PACKAGE
24-LEAD PLASTIC SSOP
TJMAX = 125°C, θJA = 130°C/ W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
LTC3776EGN
ELECTRICAL CHARACTERISTICS The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are at TA = 25°C. VIN = 4.2V unless otherwise specified.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Main Control Loops
Input DC Supply Current
Normal Operation
Shutdown
UVLO
Undervoltage Lockout Threshold
Shutdown Threshold at RUN/SS
(Note 4)
ITH1 = ITH2 = 1.3V
RUN/SS = 0V
VIN < UVLO Threshold –200mV
VIN Falling
VIN Rising
575 850
µA
9
20
µA
3
10
µA
● 1.95 2.25 2.55
V
● 2.15 2.45 2.75
V
0.45 0.65 0.85
V
Start-Up Current Source
RUN/SS = 0V
0.4
0.7
1
µA
Regulated Feedback Voltage (VFB1)
0°C to 85°C (Note 5)
–40°C to 85°C
0.591 0.6 0.609
V
● 0.588 0.6 0.612
V
Regulated Feedback Voltage (VFB2)
Output Voltage Line Regulation (VFB1)
Output Voltage Line Regulation (VFB2)
VREF = 2.5V
2.75V < VIN < 9.8V (Note 5)
● 1.232
1.250
0.05
0.02
1.268
0.2
0.1
V
mV/V
mV/V
3776f
2
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